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Leokris [45]
3 years ago
7

Calculate the work done when a force of 500N moves an object 20m. and (B) if it

Chemistry
1 answer:
strojnjashka [21]3 years ago
4 0

Answer:

work done = force multiplied by distance covered,which is 500n multiplied by 20 m= 10000nm

power= work done/time

p= 10000/10

p=1000

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I don’t really know but hope you figure it out
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What causes gas particles to collide with the walls of their containers?
blondinia [14]

Answer:

Kinetic energy

Explanation:

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Determine if each of the following statements about chiral molecules is True or False and select the best answer from the dropdo
oee [108]

Answer:

See explanation

Explanation:

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The absolute configuration is based is in specific rules that are not related to the ability to deflect polarized light. <u>FALSE</u>

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A chiral carbon by definition is a carbon with 4 groups. <u>TRUE</u>

-)<u> True or False: A racemic mixture has an optical activity of 0. </u>

In a racemic mixture, we have equal amounts of enantiomers, and this cancels out the optical activity. <u>TRUE</u>

-)<u> True or False: Normal linear amines can be chiral centers. </u>

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In primary amines, we have 2 hydrogens. Therefore all the groups can not be different. So, is <u>TRUE</u>

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-)<u>True or False: Compound C has an optical activity of 0. </u>

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We need to know the structure of the compound

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-)<u>True or False: If the R isomer of a molecule has an optical rotation of + 25.7 degree then the S isomer of the molecule will have an optical rotation of -25.7 degree. </u>

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If we have the exact opposite (as we have in this case) the magnitud of the optical activity value will remain and the sign will change. <u>TRUE</u>

-)<u>True or False: A CN is a higher priority than a CH2OH. </u>

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In this case, a carbon is directly bonded to the chiral carbon. The carbon on CN is bonded to a nitrogen atom and the carbon on CH2OH is bonded to an oxygen. So, the CH2OH will have more priority because O has a higher atomic number. <u>FALSE</u>

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-)<u>True or False: All molecules with chiral centers are optically active. </u>

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We can have for example mesocompounds in which the optical activity is canceled out due to symmetry planes. <u>FALSE</u>

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-)<u>True or False: To have an enantiomer a molecule must have at least two chiral centers. </u>

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A pair of enantiomers is made between at least 1 chiral carbon. Enantiomer R and enantiomer S. <u>FALSE</u>

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-)<u>True or False: Chiral molecules are always optically active. </u>

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We can have racemic mixtures or mesocompounds with chiral carbons but without optical activity. <u>FALSE</u>

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-)<u>True or False: A CH2CH2Br is higher priority than a CH2F. </u>

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<u>True or False: Diastereomers have the same physical properties except in a chiral environment. </u>

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<u>True or False: Compound H has an optical activity of 0. </u>

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<u>True or False: A C=C double bond is higher priority than a -CH(CH3)2.</u>

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6 0
3 years ago
(b)
mixas84 [53]

Answer:

Group 18th

Explanation:

The group 18th of periodic table which is composed of Noble gases mainly was missing from the Mendeleev's periodic table. The reason for this is that Noble gases are least reactive, therefore, it was difficult to predict such elements which do not react with other elements.

4 0
3 years ago
How any moles of H2O will be produced from 12.3 moles of HCL reacting with Ca(OH)2?
stiks02 [169]

Answer:

\large \boxed{\text{12.3 mol HCl}}  

Explanation:

We need a balanced chemical equation with moles.

            2HCl +Ca(OH)₂ ⟶ CaCl₂ + 2H₂O

n/mol:    12.3

The molar ratio is 2 mol H₂O:2 mol HCl.

\text{Moles of H$_{2}$O} = \text{12.3 mol HCl} \times \dfrac{\text{2 mol H$_{2}$O}}{\text{2 mol HCl}} = \textbf{12.3 mol HCl}\\\\\text{The reaction produces $\large \boxed{\textbf{12.3 mol HCl}}$}

3 0
3 years ago
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